Yes. But weather notwithstanding, the way to keep a cue from warping is to have it supported ON ALL SIDES. That means a case with individual SNUG tubes, or laying the cue flat on a soft bedding which will support the length of the cue(not a hard bedding or table because the shaft taper is parabolic(I think I'm using the right term).
In any case the point is, allowing a cue to stand in a cue rack will eventually warp the stick on it's own weight. Not only that, cues stand slightly tilted in a cue rack, exacerbating the issue.
And cues stored for long periods should be regularly rotated.